Question

(cos 100 + sin 100 )/ (cos 100 - sin 100 ) is equal to

Answer 1

(cos100+sin100)/(cos100-sin100)

=(cos100+sin100)(cos100+sin100)/(cos100-sin100)(cos100+sin100)

=

${cos}^{2} 100 + {sin}^{2} 100 + 2sin100cos100$

/

${cos}^{2} 100 - {sin}^{2} 100$

=sin2*100/cos2*100

=tan200